Mattress



FIG. 1 is a front, top perspective view of a first embodiment of a mattress showing my new design;

FIG. 2 is a left side view thereof, the right side being a mirror image thereof;

FIG. 3 is a front view thereof, the rear view being a mirror image thereof;

FIG. 4 is a front, top perspective view of a second embodiment of a mattress showing my new design;

FIG. 5 is a left side view thereof, the right side being a mirror image thereof;

FIG. 6 is a front view thereof, the rear view being a mirror image thereof;

FIG. 7 a perspective view of the first embodiment showing the mattress in an alternate environment; and,

FIG. 8 is a perspective view of the first embodiment showing the mattress in a second alternate environment and in an articulated position.

The cross-hatch shading is used to illustrate a surface that is different in texture or color, without reference to any specific texture or color, than the adjacent environment. The broken lines are environmental and form no part of the claimed design. 

The ornamental design for a mattress, as shown and described. 